ICD-10-CM Code G56.40

Causalgia of unspecified upper limb

Version 2021 Billable Code

Valid for Submission

G56.40 is a billable code used to specify a medical diagnosis of causalgia of unspecified upper limb. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code G56.40 might also be used to specify conditions or terms like asymmetrical hyperhidrosis or complex regional pain syndrome of upper limb or complex regional pain syndrome, type ii or complex regional pain syndrome, type ii, upper limb or hyperhidrosis due to causalgia.

ICD-10:G56.40
Short Description:Causalgia of unspecified upper limb
Long Description:Causalgia of unspecified upper limb

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Asymmetrical hyperhidrosis
  • Complex regional pain syndrome of upper limb
  • Complex regional pain syndrome, type II
  • Complex regional pain syndrome, type II, upper limb
  • Hyperhidrosis due to causalgia

Convert G56.40 to ICD-9

  • 354.4 - Causalgia upper limb (Approximate Flag)

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Nerve, nerve root and plexus disorders (G50-G59)
      • Mononeuropathies of upper limb (G56)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Complex Regional Pain Syndrome

Also called: CRPS, Causalgia, Reflex sympathetic dystrophy

Complex regional pain syndrome (CRPS) is a chronic pain condition. It causes intense pain, usually in the arms, hands, legs, or feet. It may happen after an injury, either to a nerve or to tissue in the affected area. Rest and time may only make it worse.

Symptoms in the affected area are

  • Dramatic changes in skin temperature, color, or texture
  • Intense burning pain
  • Extreme skin sensitivity
  • Swelling and stiffness in affected joints
  • Decreased ability to move the affected body part

The cause of CRPS is unknown. There is no specific diagnostic test. Your doctor will diagnose CRPS based on your signs and symptoms.

There is no cure. It can get worse over time, and may spread to other parts of the body. Occasionally the symptoms go away, either temporarily or for good. Treatment focuses on relieving the pain, and can include medicines, physical therapy, and nerve blocks.

NIH: National Institute of Neurological Disorders and Stroke

  • Complex regional pain syndrome (Medical Encyclopedia)
  • Spinal cord stimulation (Medical Encyclopedia)

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